inet: Remove unused send_check length argument

[safe/jmp/linux-2.6] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 75a00c8..70c5159 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -196,6 +196,9 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 #define TCP_NAGLE_CORK         2       /* Socket is corked         */
 #define TCP_NAGLE_PUSH         4       /* Cork is overridden for already queued data */
 
+/* TCP thin-stream limits */
+#define TCP_THIN_LINEAR_RETRIES 6       /* After 6 linear retries, do exp. backoff */
+
 extern struct inet_timewait_death_row tcp_death_row;
 
 /* sysctl variables for tcp */
@@ -241,6 +244,8 @@ extern int sysctl_tcp_workaround_signed_windows;
 extern int sysctl_tcp_slow_start_after_idle;
 extern int sysctl_tcp_max_ssthresh;
 extern int sysctl_tcp_cookie_size;
+extern int sysctl_tcp_thin_linear_timeouts;
+extern int sysctl_tcp_thin_dupack;
 
 extern atomic_t tcp_memory_allocated;
 extern struct percpu_counter tcp_sockets_allocated;
@@ -418,7 +423,7 @@ extern u8                   *tcp_parse_md5sig_option(struct tcphdr *th);
  *     TCP v4 functions exported for the inet6 API
  */
 
-extern void                    tcp_v4_send_check(struct sock *sk, int len,
+extern void                    tcp_v4_send_check(struct sock *sk,
                                                  struct sk_buff *skb);
 
 extern int                     tcp_v4_conn_request(struct sock *sk,
@@ -934,7 +939,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
 
                tp->ucopy.memory = 0;
        } else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
-               wake_up_interruptible_poll(sk->sk_sleep,
+               wake_up_interruptible_sync_poll(sk->sk_sleep,
                                           POLLIN | POLLRDNORM | POLLRDBAND);
                if (!inet_csk_ack_scheduled(sk))
                        inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
@@ -1386,6 +1391,14 @@ static inline void tcp_highest_sack_combine(struct sock *sk,
                tcp_sk(sk)->highest_sack = new;
 }
 
+/* Determines whether this is a thin stream (which may suffer from
+ * increased latency). Used to trigger latency-reducing mechanisms.
+ */
+static inline unsigned int tcp_stream_is_thin(struct tcp_sock *tp)
+{
+       return tp->packets_out < 4 && !tcp_in_initial_slowstart(tp);
+}
+
 /* /proc */
 enum tcp_seq_states {
        TCP_SEQ_STATE_LISTENING,